> ## Documentation Index
> Fetch the complete documentation index at: https://www.cashfree.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# NPCI Onboarding Configurations

> Configuration reference for BBPS biller onboarding, covering customer input parameters, payment amount exactness, additional bill fetch response fields, and payment acceptance behaviour.

In addition to legal and branding details, billers must submit the following technical configurations to NPCI as part of the onboarding process. Review each configuration and provide your decisions along with your API contracts.

## Customer input parameters

**Required**

Define the input parameters that customers must enter in the payment app to identify their account or bill. For each parameter, provide the following details:

| Field              | Description                                                                        |
| ------------------ | ---------------------------------------------------------------------------------- |
| Name               | Parameter identifier, for example, `phone_number`, `loan_number`, `policy_no`      |
| Data type          | `Alphanumeric`, `Numeric`, or `Date`                                               |
| Special characters | Whether special characters are allowed in the value, and if so, which ones         |
| Length             | Minimum and maximum character length of the value, for example, 3 to 10 characters |

## Payment amount exactness

**Required**

Select the amount behaviour you want to apply to payments received through BBPS.

| Option       | Description                                                                 |
| ------------ | --------------------------------------------------------------------------- |
| `ADHOC`      | Customer can enter any amount                                               |
| `EXACT`      | Amount is non-editable                                                      |
| `EXACT DOWN` | Customer can enter an amount equal to or less than the bill fetch amount    |
| `EXACT UP`   | Customer can enter an amount equal to or greater than the bill fetch amount |

## Additional bill fetch response fields

**Optional**

If your bill fetch response needs to return fields beyond the standard response, specify the additional parameters here. These become part of the `additional_info` object in the bill fetch response.

## Payment acceptance behaviour

**Optional**

Select whether your system should always accept payments, or accept and reject based on business logic.

* **Always accept**: Cashfree accepts all payments on your behalf, even if your systems are unavailable, and retries posting to your system later. Recommended if your system has no business logic for declining payments.
* **Accept or reject per transaction**: Your system evaluates and responds to each payment individually. Recommended if you have business logic that requires declining specific payments.